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snappercl15.c
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1 /*
2  * arch/arm/mach-ep93xx/snappercl15.c
3  * Bluewater Systems Snapper CL15 system module
4  *
5  * Copyright (C) 2009 Bluewater Systems Ltd
6  * Author: Ryan Mallon
7  *
8  * NAND code adapted from driver by:
9  * Andre Renaud <[email protected]>
10  * James R. McKaskill
11  *
12  * This program is free software; you can redistribute it and/or modify
13  * it under the terms of the GNU General Public License as published by
14  * the Free Software Foundation; either version 2 of the License, or (at
15  * your option) any later version.
16  *
17  */
18 
19 #include <linux/platform_device.h>
20 #include <linux/kernel.h>
21 #include <linux/init.h>
22 #include <linux/io.h>
23 #include <linux/i2c.h>
24 #include <linux/i2c-gpio.h>
25 #include <linux/fb.h>
26 
27 #include <linux/mtd/partitions.h>
28 #include <linux/mtd/nand.h>
29 
30 #include <mach/hardware.h>
32 #include <mach/gpio-ep93xx.h>
33 
34 #include <asm/hardware/vic.h>
35 #include <asm/mach-types.h>
36 #include <asm/mach/arch.h>
37 
38 #include "soc.h"
39 
40 #define SNAPPERCL15_NAND_BASE (EP93XX_CS7_PHYS_BASE + SZ_16M)
41 
42 #define SNAPPERCL15_NAND_WPN (1 << 8) /* Write protect (active low) */
43 #define SNAPPERCL15_NAND_ALE (1 << 9) /* Address latch */
44 #define SNAPPERCL15_NAND_CLE (1 << 10) /* Command latch */
45 #define SNAPPERCL15_NAND_CEN (1 << 11) /* Chip enable (active low) */
46 #define SNAPPERCL15_NAND_RDY (1 << 14) /* Device ready */
47 
48 #define NAND_CTRL_ADDR(chip) (chip->IO_ADDR_W + 0x40)
49 
50 static void snappercl15_nand_cmd_ctrl(struct mtd_info *mtd, int cmd,
51  unsigned int ctrl)
52 {
53  struct nand_chip *chip = mtd->priv;
54  static u16 nand_state = SNAPPERCL15_NAND_WPN;
55  u16 set;
56 
57  if (ctrl & NAND_CTRL_CHANGE) {
59 
60  if (ctrl & NAND_NCE)
61  set &= ~SNAPPERCL15_NAND_CEN;
62  if (ctrl & NAND_CLE)
63  set |= SNAPPERCL15_NAND_CLE;
64  if (ctrl & NAND_ALE)
65  set |= SNAPPERCL15_NAND_ALE;
66 
67  nand_state &= ~(SNAPPERCL15_NAND_CEN |
70  nand_state |= set;
71  __raw_writew(nand_state, NAND_CTRL_ADDR(chip));
72  }
73 
74  if (cmd != NAND_CMD_NONE)
75  __raw_writew((cmd & 0xff) | nand_state, chip->IO_ADDR_W);
76 }
77 
78 static int snappercl15_nand_dev_ready(struct mtd_info *mtd)
79 {
80  struct nand_chip *chip = mtd->priv;
81 
83 }
84 
85 static struct mtd_partition snappercl15_nand_parts[] = {
86  {
87  .name = "Kernel",
88  .offset = 0,
89  .size = SZ_2M,
90  },
91  {
92  .name = "Filesystem",
93  .offset = MTDPART_OFS_APPEND,
94  .size = MTDPART_SIZ_FULL,
95  },
96 };
97 
98 static struct platform_nand_data snappercl15_nand_data = {
99  .chip = {
100  .nr_chips = 1,
101  .partitions = snappercl15_nand_parts,
102  .nr_partitions = ARRAY_SIZE(snappercl15_nand_parts),
103  .chip_delay = 25,
104  },
105  .ctrl = {
106  .dev_ready = snappercl15_nand_dev_ready,
107  .cmd_ctrl = snappercl15_nand_cmd_ctrl,
108  },
109 };
110 
111 static struct resource snappercl15_nand_resource[] = {
112  {
113  .start = SNAPPERCL15_NAND_BASE,
114  .end = SNAPPERCL15_NAND_BASE + SZ_4K - 1,
115  .flags = IORESOURCE_MEM,
116  },
117 };
118 
119 static struct platform_device snappercl15_nand_device = {
120  .name = "gen_nand",
121  .id = -1,
122  .dev.platform_data = &snappercl15_nand_data,
123  .resource = snappercl15_nand_resource,
124  .num_resources = ARRAY_SIZE(snappercl15_nand_resource),
125 };
126 
127 static struct ep93xx_eth_data __initdata snappercl15_eth_data = {
128  .phy_id = 1,
129 };
130 
131 static struct i2c_gpio_platform_data __initdata snappercl15_i2c_gpio_data = {
132  .sda_pin = EP93XX_GPIO_LINE_EEDAT,
133  .sda_is_open_drain = 0,
134  .scl_pin = EP93XX_GPIO_LINE_EECLK,
135  .scl_is_open_drain = 0,
136  .udelay = 0,
137  .timeout = 0,
138 };
139 
140 static struct i2c_board_info __initdata snappercl15_i2c_data[] = {
141  {
142  /* Audio codec */
143  I2C_BOARD_INFO("tlv320aic23", 0x1a),
144  },
145 };
146 
147 static struct ep93xxfb_mach_info __initdata snappercl15_fb_info = {
148  .num_modes = EP93XXFB_USE_MODEDB,
149  .bpp = 16,
150 };
151 
152 static struct platform_device snappercl15_audio_device = {
153  .name = "snappercl15-audio",
154  .id = -1,
155 };
156 
157 static void __init snappercl15_register_audio(void)
158 {
160  platform_device_register(&snappercl15_audio_device);
161 }
162 
163 static void __init snappercl15_init_machine(void)
164 {
166  ep93xx_register_eth(&snappercl15_eth_data, 1);
167  ep93xx_register_i2c(&snappercl15_i2c_gpio_data, snappercl15_i2c_data,
168  ARRAY_SIZE(snappercl15_i2c_data));
169  ep93xx_register_fb(&snappercl15_fb_info);
170  snappercl15_register_audio();
171  platform_device_register(&snappercl15_nand_device);
172 }
173 
174 MACHINE_START(SNAPPER_CL15, "Bluewater Systems Snapper CL15")
175  /* Maintainer: Ryan Mallon */
176  .atag_offset = 0x100,
177  .map_io = ep93xx_map_io,
178  .init_irq = ep93xx_init_irq,
179  .handle_irq = vic_handle_irq,
180  .timer = &ep93xx_timer,
181  .init_machine = snappercl15_init_machine,
182  .init_late = ep93xx_init_late,
183  .restart = ep93xx_restart,